坑内空気中のベンゾ (a) ピレンについて

抄録

The air pollution with Benzo (a) pyrene B (a) P has been turned to be the & reat part of pollution problem, for B (a) P is recently suspected to be carcinogen. The author studied the air pollution with special emphasis on B (a) P in the mine air several years ago. In this paper he has a discussion on several analytic results of B (a) P pollution in four mine air.
The analytical process is as follows.
a) The collection of airborne dust by middle volume air sampler (500 l/min) making use of the cylindrical glass fiber filter (95φ×210mm).
b) The selective extraction of polyaromatic hydrocarbon by the Soxhlet.
c) The separation of the extractive materials into each chemical components by one dimensional dual band thin-layer chromatography.
d) The identification and determination of the separated chemical components by spectrofluorometry. This method is ordinary used to analyze B (a) P in the mine air. The results are as follows.
1) B (a) P content in the mine air polluted by the afterdamp is 0.60-4.64μg/1000m³. This content is equal to the urban air of Morioka, and in other words, is about two times as high as those in the natural back ground air, and is about a tenth part smaller than those in Tokyo or Fukuoka urban air.
2) As compared with the Maximum Non-carcinogenic Doses of B (a) P proposed by Hammond (1970), B (a) P content in me mine air is within the extent of high safety.
3) As a result of the experiment, moreover, it has been recognized that the most effective defence against B (a) P carcinogen is the use of the dust mask in the mine.